timing.h

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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef SP_TIMING_H
#define SP_TIMING_H
 
namespace sp
{
 
template <class T1> class Delay
{
  private:
    arma::uword   D;     
    arma::uword   cur_p; 
    arma::Col<T1> buf;   
  public:
    Delay()
    {
        cur_p = 0;
        D     = 0;
    }
 
    Delay( const arma::uword _D )
    {
        set_delay( _D );
        clear();
    }
 
    ~Delay()
    {
    }
 
    void clear( void )
    {
        buf.zeros();
        cur_p = 0;
    }
 
    void set_delay( const arma::uword _D )
    {
        D = _D + 1;
        buf.set_size( D );
    }
 
    T1 operator()( const T1& in )
    {
        buf[cur_p] = in; // Insert new sample
        // Move insertion point
        if( cur_p == 0 )
            cur_p = D - 1;
        else
            cur_p--;
 
        return buf[cur_p];
    }
 
    arma::Col<T1> delay( const arma::Col<T1>& in )
    {
        arma::uword   sz = in.size();
        arma::Col<T1> out( sz );
        for( arma::uword n = 0; n < sz; n++ )
            out[n] = this->operator()( in[n] );
        return out;
    }
};
 
 
} // namespace sp
#endif